20997978

素因数分解:

$2^1\times 3^1\times {\mathrm{97}}^1\times {\mathrm{109}}^1\times {\mathrm{331}}^1$

素因数の和:542

約数の個数: 32

約数和(自身を含む): 42947520

約数和(自身を除く): 21949542

約数列:

[1, 2, 3, 6, 97, 109, 194, 218, 291, 327, 331, 582, 654, 662, 993, 1986, 10573, 21146, 31719, 32107, 36079, 63438, 64214, 72158, 96321, 108237, 192642, 216474, 3499663, 6999326, 10498989, 20997978]

約数ペア:

[(1, 20997978), (2, 10498989), (3, 6999326), (6, 3499663), (97, 216474), (109, 192642), (194, 108237), (218, 96321), (291, 72158), (327, 64214), (331, 63438), (582, 36079), (654, 32107), (662, 31719), (993, 21146), (1986, 10573)]